ldc-gen-game-web/app/Models/GainView.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class GainView extends Model
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = ['name', 'file_name'];

    /**
     * Prize relation
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function prizes()
    {
        return $this->hasMany(Prize::class, 'gain_view_id');
    }
}